state two differnces betwee convex and concave lens
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1::: A convex lens is thicker at the centre and thinner at the edges. A concave lens is thicker at the edges and thinner at the centre.
2::: Concave lens have Negative Focal Length whereas Convex lens have positive focal length..
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A concave lens is thinner in the middle and thicker at the edges. A convex lens is thicker in the middle and thinner at the edges. Used in the camera, focus sunlight, overhead projector, projector microscope, simple telescope, magnifying glasses, etc. It is also used for the correction of the problem in long sight
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